Dinosaur Beaks

Several kinds of herbivore dinosaurs had a toothless beak. Some of these
dinosaurs included ceratopsians, ornithopods, ankylosaurs, and ostrich-like
dinosaurs. Some of these dinosaurs had chewing or chopping teeth located
at the back of their mouths. Ostrich-like dinosaurs did not, they had
no teeth.

Interesting Fact [Some
of the largest beaks among dinosaurs in relation to body mass belonged
to Psittacosaurus and Oviraptor.]

These beaks were mostly used for pecking, snipping, and tearing their
food. Another possible use was to peck against predators. These beaks
were able to deliver a powerful pinch-like bite causing tremendous pain
to ward off their attacker.

The dinosaur's beak was made up of the upper maxilla and the lower mandible.
When alive, the bones at the front of a dinosaur's jaw would have been
covered with horn, which formed the outer shape of the beak.